WEC 17: Halloween Fury 4 was a mixed martial arts event promoted by World Extreme Cagefighting on October 14, 2005 at the Tachi Palace Hotel & Casino in Lemoore, California. A light heavyweight tournament was held with the winner being crowned the champion and given a deal with the UFC.

WEC 21: Tapout was a mixed martial arts event held on June 15, 2006. WEC 21's main event was a fight between Rob McCullough and Ryan Healy.

DREAM.13 took place on March 22, 2010, at Yokohama Arena in Yokohama, Japan, hosted by Fighting and Entertainment Group’s DREAM. The main event features Joachim Hansen defending his Lightweight Championship against Shinya Aoki, with Hansen coming off a TKO win over Hiroyuki Takaya in 2009 and Aoki riding a submission victory over Mizuto Hirota at Dynamite!! 2009. Hansen previously won the title by defeating Aoki in 2008, while Aoki’s recent submission streak showcases his grappling dominance. Other key bouts include Josh Barnett vs. Siala-Mou "Mighty Mo" Siliga, KJ Noons vs. Andre Amado, and Cole Escovedo vs. Yoshiro Maeda.

DREAM.6 took place on September 23, 2008, at Saitama Super Arena in Saitama, Japan, promoted by Fighting and Entertainment Group’s DREAM. The main event features Gegard Mousasi facing Ronaldo Souza in the Middleweight Grand Prix final to crown the first DREAM Middleweight Champion, with Mousasi advancing after a decision win over Melvin Manhoef and Souza submitting Zelg Galešić at DREAM.4. Other key bouts include Shinya Aoki vs. Todd Moore in a lightweight clash, Yoshihiro Akiyama vs. Masanori Tonooka, and Mirko Cro Cop vs. Alistair Overeem, which ends in a no-contest due to a knee strike. Additional fights showcase Hayato "Mach" Sakurai vs. Kuniyoshi Hironaka and Atsushi Yamamoto vs. Hideo Tokoro.